Okay, I’ll bite.
What would you call a man who has a womb?
What do you call rhino with a trunk?
What do you call a cow with wings?
Seriously, what do you call them?
If a man has a womb it's because he's intersex and has been oberved as being genitally male at birth.
If a trans man has a womb it's because he's a trans man.
Men do not have wombs unless they have an intersex condition.
Or an intersex person who has both reproductive organs? Do you really not see how ‘people’ is the easiest way to include everyone?
I see how it would be appropriate to refer to someone intersex who has completely ambiguous genitalia, mix and match internal reproductive organs and presents completely ambiguously as neither obviously male or female, because biologically they are both, or neither as a 'person.'
Unless you knew that the individual in question had a preferred sex/gender identity that they use, in which case I'd use that.
But as most intersex conditions cause sterility there is not often a need to describe a pregnant intersex person as anything at all, and if they have achieved pregnancy and vaginal childbirth then can quite rightly be called a woman, as biologically, whatever else they've got going on that is complicated and non-standard, they probably are one.
The simple fact is that no woman ever impregnated another woman with her penis using semen from her testicles and no man ever released eggs from his ovaries, grew a baby in his womb and then birthed it vaginally.